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Fault detection method and device of reciprocating compressor

A fault detection and compressor technology, applied in pump testing, mechanical equipment, machines/engines, etc., can solve problems affecting efficient and economical operation, and achieve the effect of easy popularization and application, high accuracy, and improved accuracy

Inactive Publication Date: 2012-11-28
CHINA UNIV OF PETROLEUM (BEIJING)
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AI Technical Summary

Problems solved by technology

The thermal state of the unit during operation not only directly affects whether it can operate efficiently and economically, but also the cause of many major operating accidents of large units is related to the failure to adjust the operating conditions of the unit in time when the process conditions change

Method used

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  • Fault detection method and device of reciprocating compressor
  • Fault detection method and device of reciprocating compressor
  • Fault detection method and device of reciprocating compressor

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specific Embodiment

[0077] In this embodiment, the research object is the gas valve of the reciprocating compressor, and its characteristic signals are collected by vibration, temperature and pressure sensors. Through the analysis of a large amount of monitoring data, the sample data of three typical states of the valve are selected, that is, the normal state (collected in October 2008, A machine with 2 cylinders and 1 intake valve), and the slightly worn state (collected in October 2008 , Machine A, 1 cylinder, 2 intake valves) and severe wear state (collected in October 2008, machine A, 1 cylinder, 1 intake valve), where each typical state contains 12 sets of sample data. For each set of sample data, its operating condition characteristic index set and state characteristic index set are respectively constructed as RBF neural network training samples, and then the operating condition characteristic RBF fault diagnosis model and state characteristic RBF fault diagnosis model are established.

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Abstract

The invention discloses a fault detection method and a fault detection device of a reciprocating compressor. The method comprises the following steps of acquiring vibration signal parameter characteristics of the reciprocating compressor and thermal parameter characteristics comprising an air inlet temperature, an exhaust temperature, air inlet pressure and exhaust pressure of a cylinder; generating a state characteristic index set according to the vibration signal parameter characteristics; generating a working condition characteristic index set according to the vibration signal parameter characteristics and the thermal parameter characteristics; constructing a state characteristic radial basis function (RBF) fault diagnosis model and a working condition characteristic RBF fault diagnosis model respectively according to the state characteristic index set and the working condition characteristic index set; and generating a fault detection result by using a D-S evidence fusion theory according to the state characteristic RBF fault diagnosis model and the working condition characteristic RBF fault diagnosis model. By the method and the device, monitoring information of two detection means are fused, so that the accuracy rate of a judgment conclusion is remarkably improved; and the method and the device are easy and convenient to operate, low in cost, high in accuracy rate and easy to popularize and apply.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to the fault diagnosis of a large power unit, in particular to a fault detection method and device for a reciprocating compressor. Background technique [0002] Large-scale power units represented by reciprocating compressors are the key power equipment of petrochemical enterprises. Due to the high power, high speed, large flow, high pressure, complex structure, various monitoring instruments, and high requirements for operation and maintenance of such units, they are Slightly improper design, manufacture, installation, maintenance, operation and other links will cause various failures during the operation of the unit, and even cause major accidents such as equipment damage, leakage of toxic and harmful substances, and casualties. The application of condition monitoring and fault diagnosis technology can avoid unnecessary abnormal downtime, effectively formulate corresponding m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B51/00
Inventor 张来斌段礼祥
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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